Boiler



Sept. -42, 1930i T. E. MURRAY BOILER.

Filed July 14, 1925 y 5 Sheets-Sheet Sept- 2, 1930- T. E. MURRAY 1,774,810

` BOILER Filed July 14, 1925 5 Sheets-Sheet 2 000000000000000()OOOOOOyOOOODCOOQQD 60000 000000 ooooqoooocoooocooooooo Sept. 2, 1930.

T. E. MURRAY BOILER Filed July 14, 1925 S Sheets-Sheet I 4100000000 ocOOoo Sept. 2, 1930.

T. E. MURRAY l?774,810

BOILER Filed July 14, 1925 5 Sheets-Sheet 4 nmtoz v oMAsEM/Rfmn f Sept. 2, 1930. v1". EQ MURRAY 1,774,310

' BoILER 4Filed July 14, 1925 iisl'seeiS-Sheet 5 O0000000000OOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOQO 1 O00 OOQOOO OOOODOOOOOOODOOOO @nvm/coz e' Patented Sept. 1,930"

' scribed boilers utilizing :tubes eXposedjto the THOMAS E.v MURRAY,OF BROOKLYN,v 'NEW YORK; JOSEPH" BRADLEY MURRAY, THOMAS MURRAY. Je., Annaoniv n. MURRAY, EXECUTORS oF SArn `THOMAS riMURRAY.A

VDECEASED, ASSIGNORS To 'MRTRoroni'rAn ENGINEERING lcOMrArTfY; A .cOR1=.oRA'- I j 'rIoN-OF NRWYORK Y previousapplication, No. 642,725, andV in several additional applications, I have ideradiant heat', of .theburning fuel in the furnace and servingas shields or water linings for the walls ofthe furnace. A y e e f The present invention provides certain iinprovements especially. 'designed for boilers of the character described .in .the aforesaid ap'-A modification.

Figi isaiongitudinaisecuestra bene plications, and applicable also to boilers of F 2islatransverse section-of the same approximately on theline 2-21of Fig.-1; r

Figs. 3` and 4 .are sectionsA similar tofFigs. 1

(.1, and 2 illustrating a vinnodification' in"detail;.

Figs and/6. are sections similar to. Fig. 1 illustrating further modifications in.n detail a `Figs. 7 and 8 are complete longitudinal and transverse f sections illustrating a further Referringto the f embodiments '.of the. invention illustrated, the furnace has front and back walls l and12 respectively` andside walls 3,:fFig. 27 atfthe bottom of whivchisan ash pit 4. Adj acent to the side walls ofthe furnace,

in Figs. 1 and 2,v are vertical water carrying tubes extendingup to about' the top of the rear vwall and side walls l of the" furnace. Above the furnace are located banks ofslightl ly inclined, approximately V-lioriz-ontal'-ftubes ofthe usual style such as the steamy generating tubes i6 and 71 andthe superheater tubesA 8;

e these being encased in walls of anyusual or suitable constructon. The; front wall. 1 is may-- use powdered coal, oil, gas'or other jet fuel. The combustionl is initiated in the oft-V set `portion ofi the furnace 'beneath the arch;

The tubesl-5 lining thefurnace are Isubjected to the direct radiant heat of the burning fuel figorLiirar` i l l 1925. .Senn Np. 43,443.' Y

will generate-steam very: rapidly. f

combustion gases lpass :upc/ard between the horizontal'. tubes and around the baliles 11,v

furnace f( and this applies to all theother fig` ures aswell as to Figs. 1y and 2), may be of the ordinary' simple design or they may" be 'I like the tubes described in the aforesaid prior application, spaced apart land havingl longitudlnal 'flangesoccupying the spaces between them `so as' to present a verylargerheating surface in proportion to-,fthe volumeof water n-thetubes. m v

:The circulation infthe .horizontalj tubes p above the furnace is as follows. l[I'he'heated water and steam pass to vertical headers' 15 at the Aupper ends of. the tubes 6,5thencey `through connecting pipes 16' into vertical headers 17atthe upper sends of the tubes 'l' andthcnce'through'pipes 18 to the steam y drumV 19; whence the water returns by' pipes n 20.' to vertical headers 21 at the lower ends of thetube 7, ythence by `pipes 22 to vertical headers 23 atthe lower ends of the tubesu'.v

'lheheaders 23'lead downward-to a transverse` .header24 which may serve as a mud' drum for the circulating system of the upper boilerl f tubes. The steam from the drum'19 passes out through thefpipe 25 tothe tubesof the superheater-S and finally to the point of consumption. "I

The circulation for the verticalrtubes 5 within the furnace is followsffThefwater land steam from the upper ends ofthe tubes pass into horizontal headers 26 onthe outsideV of the-boiler walls which have loran'chesf27 leading to opposite ends ofa header 28runrningacross theffront of the boiler atA about the level kof the steam drullflvr and communicat- Y Vingf withftheV latter through pipes29; theA water vreturnsfrom'the kdrum 19 through the A i yheaders r2'1fand 23 atthe lower endsof the.,

yhorizontal tubesto the cross header 24. v From its ends,v this header leadsjto vertical pipes 30 extended downward and thence tojpipes 31 leading obliquely downward and backward tothe rear ends of longitudinal headers 32. at

the lower ends of the pipes 5.k The .headers Loo' l r wall immediately above it are subjected tok `extremely 'high temperatures and I propose c y32 are Ip lovidedwith blow-olf valves 33 at Lheirforward ends.

The arch 9 and the portion 34 of the front to protect them and at the same time to provide for further generation of steam by a lscreen of water tubessimilarto the tubes ,i which protect the side walls. These tubes 35 `10 extend lengthwise under the arch9, leading to' vertical tubes 36 on the inner face ofthe wall734 whichleadout to a header' 37 extendi Y ing across the front of the wall. At the ends t of the header 37 itis connected by pipes l38 with the pipes 27 previously referred to. The

pipes 30 which lead down from the ends of the header. 24 .have two branches at their lower ends ofthe tubes 35. Thus the circulating system for this water wall of tubes 35 and 36 is complete,the hotwater and steam going Vupfthrough thepipe 38 into the drunr19 and y 3or the water passing from the latter down to the heady 24 and pipe 30 to the header 40 at the lower ends of the tubes. f

Instead of beingr arranged as a steam generating means,1the tubes 35 Vand36may be connected into thef'water supply system to the lower header for the pipesr. See Figs. 3v and 4. The Vheader 24 is connected directly to the upper'ends of the pipes 36, the'pipes 39 lead-l ing from the ends of the header 40 communi# eating only with the pipes 31 which lead as A in Fig...1 tothe supply headers at the lower ends of the tubes 5.

' .In yall of the constructions illustrated the arch p'rotectingitubes f may be themselves shielded by a wall or layer of tiles 41, Fig. 5.

This is particularly applicable to thea'rrange-A ment of Fig. 3 in which the tubes 35, 36 are in the water supply system rather than inl thesteam generating system.

` Fig. 6 shows the arch protecting water wall used as part of thefsuperheating system. A

pipe 42 leads downward from the header 43 at the outlet end of the superheater and lea-ds to the endsY of the header 40, whence the steam passes through the tubes 35 and 36 and thence tor-a header 37 as in Fig. 1, whichheader leads by any -usual or suitable connection 37 a tothe steammain.- Fromthe header 24 the supply ofwater passes through a pipe 44 to headers atthe bottom ofthe tubes 5.

' Figs. 7 and Sillustrate kthe invention ap- `pliedto a furnace 'inwhich front andk back` 'walls 45 and46 are made comparatively thin andare protectedby walls oftubing 47 and ,48 respectively similar to the tubing 5 which protectsthe side walls. In this case the circulation for the front wall 47 includes the tubes35 and 36. -The upperheader 49 for tubes 47.

invasie the tubes 47 leads into the lower ends of the tubes 35. From 36 it passes into the headers 23 and thence upward through pipes 22 into headers l, the latter being closed at their upper' ends. Thus the water passes upward from the headers 23 and 21 through the tubes 6 and 7. The water from the drum 19 passes down by pipes 50 to a header 51 at the ends of which arc branches 52 which lead to the ends of a header 53 on the lower ends of the rl`his communicates with the longitudinal headers 32 at the ends of the tribes 5. The headers 32 in turn communicate with the header54 for the tubes 48. At their upper ends the tubes 48 communicate with Vthe headers15pipes 16, headers 17 and pipes 18A leading to the steam drum.

Supplementary tubes 55 are added along the side walls under-the arch, connected at their lower ends to the side headers 32. The headers 26 at Athe upper ends of the tubes 5 are supplemented by headers 56 at the upper ends of the tubes 55, communicating by pipes 57 with the ends of the headers 26 and with the steam pipes 27 leading to the drum.

It will be observed from Figs. 2, 7 and. 8

that the headers. for the tubes within the furnace are shielded from the fire by being l0- cated outsideof a portion of the wall.

An additional feature of improvement, which I have shown particularly in connection with Fig. 1, is in the inclining of the headers 26 and 32 so that the water will enter the` lower ends of the headers 32 and will be circulated forward and vupward through these headers into the successive tubes 5; and so that the water and steam from the tubes 5 will enter the headers 26and will pass upward and forward to the ends of the latter leading to the steam drum. By this inclination of the headers l avoid theA possibility of air orfsteazn pockets and provide for a circulation which isy continuously upward from the low point at which the water enters the bottom headers. The same scheme of inclining the headers upwardly and forwardly with the circulation may be applied to the dierent arrangements of furnace water walls shown in the other figures.

Various modifications may be made by those skilled in the art without departure from the invention as defined in the following claims. n

llVhat I claim is:

1. A boiler having a steam drum and having a furnace with walls comprising vertical water tubes extending substantially from bot-tom to top of the furnace so as to be eX- posed'to the radiant heat of the burning fuel and to generate steam at a high rate and hav- -ing inlet and outlet headers, said boiler having slightly inclined, approximately horizontal steam generating tubes overhead heated by the gases passing out of the combustion chamber with their lower ends at the front,

the furnace having an arch of Vrefractory ma!v terial projecting outward beyond the. front of said inclined tubes anda wallof water 1 tubes extending along the under side of the .Y arch and upward in line with the frontends of said inclined tubes, the inclined tubes hav-v ing inlet headers at their front'en'ds connected with theofftake from the steam drum, the

arch tubes and-the inlet headers of the vertical tubing being connected iwith thev inlet headers of the inclined tubes,fand theoutlet headers of said Vvertical tubing being lcon-v.

V`nected to the intake of the steam drum.

' 2.V A boilerhaving a steam Vdrum and having a furnace withwalls comprising vertical water tubes 'extending substantially from rbottom to top of the furnace` so as to be exposed to theradiant heat of the'burningfuel and to generateisteam at a high rate andhaving inlet and outlet`headers,jsaid boiler hav- Y ing slightly inclined, approximately horizon# alle.r

tal. steam generating' tubes overhead heated by the gases passing out of the combustion chamberwith their lower ends at the front, the furnace having an arch of refractory Inaterial projecting outward beyond the front of Y. d said inclined tubes and a wall of water tubes extending-along the underside 'ofthe'archk and upward in line with the front ends of said inclined tubes and having inlet and outlet headers,'theinclined tubes having `inlet headers at, their front ends connected with .the offtakefrom the steam drum.cominnni-V eating with the inletheaders of said vertical Water walls and of said arch tubes, and the outlet headers vof said vertical waterwallsV and of the Yarch'tuloes communicating-.with

. the intake of the steam drum. d

In witness whereof, I have hereuntosigned THOMAS EMURRAY. f-

Hly llame. 

